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NAME | DESCRIPTION | SEE ALSO | COLOPHON |
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proc_stat(5) File Formats Manual proc_stat(5)
/proc/stat - kernel system statistics
/proc/stat
kernel/system statistics. Varies with architecture.
Common entries include:
cpu 10132153 290696 3084719 46828483 16683 0 25195 0
175628 0
cpu0 1393280 32966 572056 13343292 6130 0 17875 0 23933 0
The amount of time, measured in units of USER_HZ
(1/100ths of a second on most architectures, use
sysconf(_SC_CLK_TCK) to obtain the right value),
that the system ("cpu" line) or the specific CPU
("cpuN" line) spent in various states:
user (1) Time spent in user mode.
nice (2) Time spent in user mode with low
priority (nice).
system (3) Time spent in system mode.
idle (4) Time spent in the idle task. This value
should be USER_HZ times the second entry in
the /proc/uptime pseudo-file.
iowait (since Linux 2.5.41)
(5) Time waiting for I/O to complete. This
value is not reliable, for the following
reasons:
• The CPU will not wait for I/O to
complete; iowait is the time that a task
is waiting for I/O to complete. When a
CPU goes into idle state for outstanding
task I/O, another task will be scheduled
on this CPU.
• On a multi-core CPU, the task waiting for
I/O to complete is not running on any
CPU, so the iowait of each CPU is
difficult to calculate.
• The value in this field may decrease in
certain conditions.
irq (since Linux 2.6.0)
(6) Time servicing interrupts.
softirq (since Linux 2.6.0)
(7) Time servicing softirqs.
steal (since Linux 2.6.11)
(8) Stolen time, which is the time spent in
other operating systems when running in a
virtualized environment
guest (since Linux 2.6.24)
(9) Time spent running a virtual CPU for
guest operating systems under the control of
the Linux kernel.
guest_nice (since Linux 2.6.33)
(10) Time spent running a niced guest
(virtual CPU for guest operating systems
under the control of the Linux kernel).
page 5741 1808
The number of pages the system paged in and the
number that were paged out (from disk).
swap 1 0
The number of swap pages that have been brought in
and out.
intr 1462898
This line shows counts of interrupts serviced since
boot time, for each of the possible system
interrupts. The first column is the total of all
interrupts serviced including unnumbered
architecture specific interrupts; each subsequent
column is the total for that particular numbered
interrupt. Unnumbered interrupts are not shown,
only summed into the total.
disk_io: (2,0):(31,30,5764,1,2) (3,0):...
(major,disk_idx):(noinfo, read_io_ops, blks_read,
write_io_ops, blks_written)
(Linux 2.4 only)
ctxt 115315
The number of context switches that the system
underwent.
btime 769041601
boot time, in seconds since the Epoch, 1970-01-01
00:00:00 +0000 (UTC).
processes 86031
Number of forks since boot.
procs_running 6
Number of processes in runnable state. (Linux
2.5.45 onward.)
procs_blocked 2
Number of processes blocked waiting for I/O to
complete. (Linux 2.5.45 onward.)
softirq 229245889 94 60001584 13619 5175704 2471304 28
51212741 59130143 0 51240672
This line shows the number of softirq for all CPUs.
The first column is the total of all softirqs and
each subsequent column is the total for particular
softirq. (Linux 2.6.31 onward.)
proc(5)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.9.1.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2024-06-26. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
[email protected]
Linux man-pages 6.9.1 2024-05-02 proc_stat(5)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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